reprinted from a Maxell press release:

TOKYO, JAPAN, (August 2, 2007) — Hitachi Maxell, Ltd. (TSE/OJE : 6810) today announced that the company will launch the worlds first*1 8 cm Blu-ray write-once BD-R/rewritable BD-RE discs (7.5GB) for video cameras on August 10. When used with Blu-ray-Disc-compatible video cameras, these products enable long-duration filming of approximately 60 minutes*2 with full high-definition picture quality which has 1920 x 1080 pixels.

In the video camera market, video cameras that use optical discs (DVDs) as data storage media are becoming increasingly popular due to the outstanding portability and functionality of optical discs. With the recent increase in the popularity of high-definition-quality video, demand for products compatible with high- definition-quality recording has been growing. As a result, there is demand for recording media with even larger storage capacities for hi-vision-picture-quality filming, which requires the storage of huge volumes of information.


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Launched by Hitachi Maxell, these 8 cm Blu-ray Discs enable full high-definition -quality recording for approximately 60 minutes*2 and are compatible with the worlds first*1 Blu-ray Disc-compatible video cameras, which is launched by Hitachi, Ltd.

These products combine original core technologies compatible with blue-violet lasers and technologies for video-camera optical discs that the Company has continued to develop since commercializing the worlds first 8 cm DVD-RAM disc for video cameras. Further, the Company designed these products with consideration for the heightened reliability required for outdoor usage. For these products, the Company has achieved uniform shape, weight, and thickness through MHSS (Maxell High Stabilized Spin) technology, which controls substrate molding and the high-precision 0.1 mm cover layer and hard coat layer. These innovations enable stable filming movement by curbing vibration of the camera body due to disc rotation. Further, Hitachi Maxell has incorporated a recording-surface HG hard coat (hard coat layer) that has stronger protective characteristics than the hard coats of the Companys existing DVDs, thereby improving reliability with respect to scratches, dust, and fingerprints when the products are used outdoors. In addition, these products achieve stable recording and reproduction characteristics thanks to the incorporation of newly developed inorganic recording film (BD-R) and phase-change recording film (BD-RE) that ensure a wide margin with regard to the recording laser power.

Since launching the worlds first DVDs for video cameras (cartridge-type 8 cm DVD-RAM) in August 2000, Hitachi Maxell has led the development and commercialization of optical discs for video cameras. Going forward, Hitachi Maxell will continue to advance the development of large-storage-capacity optical discs while marketing products that cater to demand for high-definition-generation recordable optical discs.

*1 As of August 2, 2007. Survey by Hitachi Maxell.
*2 Filming durations vary according to cameras and recording modes.

Main Features

“MHSS technology and HG hard coat specifically for 8 cm Blu-ray Discs that ensure outstanding reliability for outdoor usage

Having developed the worlds first 8 cm DVD-RAM (launched August 2000) compatible with video cameras, Hitachi Maxell incorporated in these products the following technologies, which the Company developed and designed specifically for 8 cm Blu-ray Discs and with consideration for the outdoor usage.

1. “MHSS: Maxell High Stabilized Spin technology that stabilizes disc rotation
Maxell incorporated MHSS technology to mitigate camera body vibration during filming by heightening the stability of disc rotation. The comprehensive incorporation of substrate molding technology that curbs biases in shape, weight, and thickness and technologies that uniform 0.1 mm recording-film-surface cover layers and HG hard coat layers curbs wobbling when discs rotate, reduces the occurrence of vibration, and realizes a stable filming environment.

2. HG hard coat that protects the recording surface from scratches, dust, and fingerprints
Hitachi Maxell has incorporated HG hard coat for the recording surface. The coat protects the 8 cm BD recording surface, often used outdoors, from scratches, dust, and fingerprints that cause errors when recording and reproducing.

*1 As of August 2, 2007. Survey by Hitachi Maxell.

High-precision Blu-ray Disc core technology that uses blue-violet lasers to enable high-density recording

1. Laser-cutting technology
Because Blu-ray discs realize high data storage capacities, 7.5GB (for a 8 cm disc), per layer, substrate surfaces require narrow (0.32 m) track-pitch grooves that are less than half that of DVD-R discs. By using high-precision laser cutting, Hitachi Maxell realizes precise and smooth-processed groove shapes on the BD stampers. The technology enables the acquisition of low-noise read-out signal.

2. Inorganic recording layer and phase-change recording layer that enable high-density recording
In order to record the data mark in very small pitch, Hitachi Maxell has incorporated precise thermal control layer design for inorganic recording layer (BD-R) and phase change recording layer (BD-RE) . This enables high-density recording by suppressing the effect of the thermal interference in adjacent recording marks, resulting a wide recording laser power margin and achieving stable characteristics for the recording and reproduction.

3. Advanced uniforming technology for 0.1 mm cover layers
The technology applies a uniform 0.1 mm thin cover layer on the recording-film surfaces of BD-R/RE discs from the inner circumference to the out circumference. This technology realizes the structural precision required by Blu-ray Discs for high-density recording.

Video-camera-compatible 8 cm BD-R discs are compliant with the Blu-ray Disc Recordable Format Version 1.2 standard, and 8 cm BD-RE discs are compliant with the Blu-ray Disc Rewritable Format Version 2.1 standard. When used with video cameras complaint with that standard, 60 minutes*2 (7.5GB) of filming with full high-definition picture quality is possible.

*2 Filming durations vary according to cameras and recording modes.